<template>
  <div class="create-post-page">
    <h4>{{isEditMode ? '编辑文章' : '新建文章'}}</h4>
    <uploader
      action="/upload"
      :beforeUpload="uploadCheck"
      @file-uploaded="handleFileUploaded"
      class="d-flex align-items-center justify-content-center bg-light text-secondary w-100 my-4"
      :uploaded="uploadedData"
    >
      <h2>点击上传头图</h2>
      <template #loading>
          <div class="d-flex">
            <div class="spinner-border text-secondary" role="status">
              <span class="sr-only">Loading...</span>
            </div>
            <h2>正在上传</h2>
          </div>
      </template>
      <template #uploaded="dataProps">
        <div class="uploaded-area">
          <img :src="dataProps.uploadedData.data.url">
          <h3>点击重新上传</h3>
        </div>
      </template>
      <!-- <template #uploaded="dataProps">
        <img :src="dataProps.uploadedData.data.url" alt="">
      </template> -->
    </uploader>
    <h2>{{titleVal}}</h2>
    <!-- <input type="file" name="file" @change.prevent="handleFileChange"/> -->
    <validate-form @form-submit="onFormSubmit">
      <div class="mb-3">
        <label class="form-label">文章标题：</label>
        <validate-input
          :rules="titleRules" v-model="titleVal"
          placeholder="请输入文章标题"
          type="text"
        />
      </div>
      <div class="mb-3">
        <label class="form-label">文章详情：</label>
        <!-- <textarea ref="textarea"></textarea> -->
        <editor 
          v-model="contentVal" 
          :options="editorOptions"
          @blur="checkEditor"
          ref="editorRef"
          :class="{'is-invalid':!editorStatus.isValid}"
        >
        </editor>
        <span v-if="!editorStatus.isValid" class="invalid-feedback mt-1">{{editorStatus.message}}</span>
        <!-- <validate-input
          rows="10"
          type="text"
          tag="textarea"
          placeholder="请输入文章详情"
          :rules="contentRules"
          v-model="contentVal"
        /> -->
      </div>
      <template #submit>
        <!-- <button class="btn btn-primary btn-large">创建</button> -->
        <button class="btn btn-primary btn-large">{{isEditMode ? '更新文章' : '发表文章'}}</button>
      </template>
    </validate-form>
  </div>
</template>

<script lang="ts">
import { defineComponent, ref, onMounted,reactive } from 'vue'
import { useStore } from 'vuex'
import { useRouter, useRoute } from 'vue-router'
// import EasyMDE from 'easymde'
import EasyMDE,{Options} from 'easymde'
import axios from 'axios';
import { GlobalDataProps, PostProps,ResponseType,ImageProps } from '../store'
import ValidateInput, { RulesProp } from '../components/ValidateInput.vue'
import ValidateForm from '../components/ValidateForm.vue'
import Uploader from '@/components/Uploader.vue';
import Editor from '../components/Editor.vue'
import createMessage from '../components/createMessage'
import { beforeUploadCheck } from '../helper'
interface EditorInstance{
  clear:() => void;
  getMDEInstance: () => EasyMDE | null;
}
export default defineComponent({
  name: 'Login',
  components: {
    ValidateInput,
    ValidateForm,
    Uploader,
    Editor
  },
  setup() {
    const uploadedData = ref()
    const titleVal = ref('')
    const editorStatus = reactive({
      isValid:true,
      message:''
    })
    const router = useRouter()
    const route = useRoute()
    const isEditMode = !!route.query.id;
    const store = useStore<GlobalDataProps>()
    const textarea = ref<null | HTMLTextAreaElement>(null)
    const editorRef = ref<null | EditorInstance>()
    let imageId = ''
    const editorOptions:Options = {
      spellChecker:false
    }
    const titleRules: RulesProp = [
      { type: 'required', message: '文章标题不能为空' }
    ]
    const contentVal = ref('')
    const contentRules: RulesProp = [
      { type: 'required', message: '文章详情不能为空' }
    ]
    const checkEditor = () =>{
      if(contentVal.value.trim() === ''){
        editorStatus.isValid = false
        editorStatus.message = '文章详情不能为空'
      }else{
        editorStatus.isValid = true
        editorStatus.message = ''
      }
    }
    onMounted(() => {
      /* if(textarea.value){
        const easyMDEInstance = new EasyMDE({ element: textarea.value})
      } */
     if(editorRef.value){
        console.log(editorRef.value.getMDEInstance())
     }
      if(isEditMode){
        store.dispatch('fetchPost',route.query.id).then((rawData:ResponseType<PostProps>) => {
            const currentPost = rawData.data
          if (currentPost.image) {
            uploadedData.value = { data: currentPost.image }
          }
          titleVal.value = currentPost.title
          contentVal.value = currentPost.content || ''
        })
      }
    })
    const handleFileUploaded = (rawData: ResponseType<ImageProps>) => {
      if (rawData.data._id) {
        imageId = rawData.data._id
      }
    }
    const onFormSubmit = (result: boolean) => {
      if (result) {
        checkEditor()
        if(result && editorStatus.isValid){

        }
        const { column, _id } = store.state.user;
        if(column){
          const newPost: PostProps = {
            // 转成 string 类型
            // _id:new Date().getTime().toString(),
            title:titleVal.value,
            content:contentVal.value,
            // 转成 string 类型
            // column: column.toString(),
            column: column,
            author:_id,
            // createdAt:new Date().toLocaleDateString()
          }
          if(imageId){
            newPost.image = imageId
          }
          const actionName = isEditMode ? 'updatePost' : 'createPost'
          const sendData = isEditMode ? {
            id: route.query.id,
            payload: newPost
          } : newPost
          store.dispatch(actionName, sendData).then(() => {
            createMessage('发表成功，2秒后跳转到文章', 'success', 2000)
            setTimeout(() => {
              router.push({ name: 'column', params: { id: column } })
            }, 2000)
          })
          // router.push('/')
          // store.commit('login')
          // store.commit('createPost',newPost)
          // router.push({name:'column',params:{id:column}})
        }
      }
    }
    const handleFileChange = (e: Event) =>{
      const target = e.target as HTMLInputElement
      const files = target.files
      if(files){
        const uploadedFile = files[0];
        const formData = new FormData();
        formData.append(uploadedFile.name ,uploadedFile)
        axios.post('/upload',formData,{
          headers: {
            'Content-Type': 'multipart/form-data'
          }
        }).then(resp => {
          console.log(resp)
        })
      }
    }
    const uploadCheck = (file:File) =>{
      const result = beforeUploadCheck(file, { format: ['image/jpeg', 'image/png'], size: 1})
      const { passed, error } = result;
      if (error === 'format') {
        createMessage('上传图片只能是 JPG/PNG 格式!', 'error')      }
      if (error === 'size') {
        createMessage('上传图片大小不能超过 1Mb', 'error')
      }
      return passed
    }
    return {
      titleRules,
      titleVal,
      contentVal,
      contentRules,
      onFormSubmit,
      handleFileChange,
      uploadCheck,
      handleFileUploaded,
      uploadedData,
      isEditMode,
      textarea,
      editorOptions,
      editorRef,
      checkEditor,
      editorStatus
    }
  }
})
</script>
<style>
.create-post-page .file-upload-container {
  height: 200px;
  cursor: pointer;
}
.create-post-page .file-upload-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
</style>